Statistics of velocity fluctuations in turbulent Couette-Taylor flow

ORAL

Abstract

Azimuthal and axial velocity fluctuations between concentric cylinders were measured using Laser Doppler Anemometry in a turbulent Taylor-Couette apparatus. We measured the velocity fluctuations in the middle of the gap and near the outer wall, for pure inner cylinder and counter-rotating cylinders at a fixed Reynolds number of $2 \times 10^6$. The velocity structure functions calculated using extended self-similarity exhibit clear power-law scaling. The transverse and longitude structure function exponents have been compared in two measurement positions.

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Authors

  • Chao Sun

    • The University of Twente
    • University of Twente
    • Physics of Fluids group, University of Twente
    • University of Twente, The Netherlands
    • Physics of Fluids Group, University of Twente

  • Sander Huisman

    • Physics of Fluids group, University of Twente

  • Dennis van Gils

    • Physics of Fluids group, University of Twente

  • Detlef Lohse

    • The University of Twente
    • University of Twente
    • Physics of Fluids group, University of Twente
    • Physics of Fluids, Twente University, The Netherlands
    • University of Twente, The Netherlands
    • Physics of Fluids, University of Twente
    • Physics of Fluids Group, University of Twente